1 package antlr;
2
3 * <b>SOFTWARE RIGHTS</b>
5 * <p>
6 * ANTLR 2.5.0 MageLang Institute, 1998
7 * <p>
8 * We reserve no legal rights to the ANTLR--it is fully in the
9 * public domain. An individual or company may do whatever
10 * they wish with source code distributed with ANTLR or the
11 * code generated by ANTLR, including the incorporation of
12 * ANTLR, or its output, into commerical software.
13 * <p>
14 * We encourage users to develop software with ANTLR. However,
15 * we do ask that credit is given to us for developing
16 * ANTLR. By "credit", we mean that if you use ANTLR or
17 * incorporate any source code into one of your programs
18 * (commercial product, research project, or otherwise) that
19 * you acknowledge this fact somewhere in the documentation,
20 * research report, etc... If you like ANTLR and have
21 * developed a nice tool with the output, please mention that
22 * you developed it using ANTLR. In addition, we ask that the
23 * headers remain intact in our source code. As long as these
24 * guidelines are kept, we expect to continue enhancing this
25 * system and expect to make other tools available as they are
26 * completed.
27 * <p>
28 * The ANTLR gang:
29 * @version ANTLR 2.5.0 MageLang Institute, 1998
30 * @author Terence Parr, <a href=http://www.MageLang.com>MageLang Institute</a>
31 * @author <br>John Lilley, <a href=http://www.Empathy.com>Empathy Software</a>
32 */
33 class CharRangeElement extends AlternativeElement {
34 String label;
35 protected char begin=0;
36 protected char end =0;
37 protected String beginText;
38 protected String endText;
39
40
41 public CharRangeElement(LexerGrammar g, Token t1, Token t2, int autoGenType) {
42 super(g);
43 begin = (char)ANTLRLexer.tokenTypeForCharLiteral(t1.getText());
44 beginText = t1.getText();
45 end = (char)ANTLRLexer.tokenTypeForCharLiteral(t2.getText());
46 endText = t2.getText();
47 line = t1.getLine();
48 for (int i=begin; i<=end; i++) {
50 g.charVocabulary.add(i);
51 }
52 this.autoGenType = autoGenType;
53 }
54 public void generate() {
55 grammar.generator.gen(this);
56 }
57 public String getLabel() {
58 return label;
59 }
60 public Lookahead look(int k) {
61 return grammar.theLLkAnalyzer.look(k, this);
62 }
63 public void setLabel(String label_) {
64 label = label_;
65 }
66 public String toString() {
67 if ( label!=null ) return " "+label+":"+beginText+".."+endText;
68 else return " "+beginText+".."+endText;
69 }
70 }
71